Shaper-guard.



W. G. STEWART.

SHAPER GUARD.

APPLIOA'IJION 31mm MAR.31, '1909.

Patented Apr. 19, 191-0.

UNTTED STATES PATENT @FFTQFL.

WALTER G. STEWART, OF ALLENTOWN, PENNSYLVANIA.

SHAPER-GUAED.

To all whom it may concern:

Be it known that I, WALTER Gr. STEWART, a subject of the King of GreatBritain, residing at Allentown, in the county of Lehigh and State ofPennsylvania, have invented new and useful Improvements inSharper-Guards, of which the following is a specification.

This invention relates to guards for cutter heads or similar shapingapparatus, and has for an object to provide a cutter with a novel andsimple form of guard disposed directly above the cutting knives andprovided with transparent material adapted to prevent, in operation ofthe cutter, flying splinters or pieces of material from coming incontact with the operator, or from flying in his eyes, thus obviatinginjury to the operator when the cutter is in operation.

A still further object of my invention is to provide a cutter guard ofthe character described provided with transparent material disposedimmediately above and adjacent to the cutting knives and to constructthe guard in such manner that in operation thereof a current of air willbe created immediately above the cutting knives to allow waste andcutting material and chips to be blown without the aid of the operatoroff of the table upon which the cutter is mounted.

Another object of my invention resides in the peculiar construction ofthe guard wherein when molding is in its correct position with respectto the cutting knives a comparatively small space will be providedbetween the upper surface of the molding and the lower peripheral edgeof the guard itself which will effectively obviate the en trance of thefingers of the operator beneath the guard and prevent the fingers fromcoming in contact with the cutting knives.

A further object of my invention is to provide a novel form of cutterprovided with means which will readily permit the operator to remove anold or worn piece of transparent material and replace by a new piece.

Other objects and advantages will be apparent as the nature of theinvention is better set forth, and it will be understood that changeswithin the scope of the claims may be resorted to without departing fromthe spirit of the invention.

In the drawing, forming a portion of this specification and in whichlike numerals of reference indicate similar parts in the sev-Speeification of Letters Patent.

Application filed March 31, 1909.

Patented Apr. 19, 1910..

Serial No. 486,959.

eral views :Figure 1 is a top plan View of the guard. Fig. 2 is a sideelevation of a cutter head showing the manner of connecting the guardthereto. Fig. 8 is a detail section taken on the line 33 of Fig. 1. Fig.1 is a view similar to Fig. 3 showing a slightly modified form of myinvention.

Referring now more particularly to the drawing, and with particularreference to Fig. 2 thereof, there is shown a portion of a table uponwhich is mounted in any desired manner a cutter head 2 or similarapparatus provided with a vertical spindle 3 upon which is mounted apair of collars 4, and between said collars a plurality of cuttingknives 5 are secured.

My improved guard is illustrated at 6 and comprises a wheel embodyingannular rim sections 7 and 8, the latter being some-- what thicker thanthe former. The section 7 is provided with a plurality of radial spokes9 having downwardly directed portions 10, and the said spokes at theirinner ends are connected to a sleeve 11 mounted upon the spindle 8. Thesection 8 is provided with a plurality of radial spokes 12 havingdownwardly and outwardly curved portions 13 similar to the portions 10of the spokes 9. The spokes 12 are connected at their inner ends to asleeve 14 mounted upon the spindle- 3, as shown. The spokes 9 and 1 areadapted to aline with each other, and secured between the spokes andbetween the rim sections 7 and 8 is a piece of transparent material 15.The transparent material may be celluloid or the like providing it besomewhatfiexible so that it can be secured between the rim sections 7and 8 and the spokes 9 and 12 and conformed to their shape withouthaving to mold or otherwise construct the material 15 into a particulardesign. After the transparent material has been properly placed betweenthe rim sections and between the spokes, I pass through the spokes aplurality of retaining screws 16 which latter while not only serving toretain the transparent material in place also serve as means for holdingthe rim sections 7 and 8 together.

After the guard has been properly positioned upon the spindle I arrangeupon the spindle a collar 17 disposed directly above the sleeve let, andI provide the said spindle with a clamping nut 18 adapted to be engagedwith the collar. WVhen the guard is in its operative position it will beseen that the lower peripheral edge of the rim section 7 will bedisposed immediately above the upper edges of the cutting knives 5 andthat the outer ends or the knives will be disposed at a suitabledistance inwardly of the peripheral edge of the rim section 7. A seotion of molding is illustrated at 19 in Fig. 2 of the drawing and it isobvious incident to the construction of the guard that a very smallspace will be provided between the upper surface of the molding and thelower edge of the rim section 7 which obviates or prevents the entranceof the fingers of the operator between the upper surface of the moldingand the lower edge of the rim section 7 and prevents the fingers fromcoming in contact with the cutting knives 5.

in Fig. t of the drawing is illustrated a slightly modified form of myinvention in which the guard 20 embodies rim sections 21 and 22 havingsecured therebetween transparent material in this form of my invention 1preferably provide a plurality oi' spol'es arranged in a common plane toeach other.

From the foregoing, it will be appreciated that I provide a novel formof guard adapted to be used in connection with shapers, outter heads orsimilar cutting apparatus, providing the said guard with transparentmeans disposed immediately above the cutting knives, the provision or"the said trans parent material etl'ectively obviating flying splintersor other material from hitting the face or body of. the operator of theapparatus and also provides means allowing the operator to obtain aperfect observation of the cutting knives directly above the same. Theconstruction of the guard, is further such that incident to the factthat the spaces between the spokes of the rim sections are closed by theprovision therebetween of the transparent material air currents createdduring operation of the cutter or shaper will. not escape upwardly frombetween the spokes but will be allowed to pass outwardly in a horizontalplane from the peripheral edge of the rim section 7 in such manner thatcut material, such as shavings and the like will be blown from the tablewithout the assistance of the operator.

I claim 1. A guard of the class described comprising companion membersarranged in superimposed relation and having means adapted to be securedto the spindle of a cutter head or shaping tool and provided withtransparent means adapted to be disposed immediately above the cuttingknives of a cutter head or shaping tool and removably secured betweenthe members of the said guard.

2. The combination with a cutter head or shaping tool, of a guardcarried by the tool and disposed directly above the cutting knives ofthe said head or tool, said guard consisting of superimposed membershaving a plurality of spaced spokes, and transparent material removablysecured between the said members and adapted to close the spaces betweenthe spokes.

A cutter head provided with a plurality of cutting knives, and a guarddisposed immediately above the knives and comprising superimposedmembers, transparent material disposed between the said memberspermitting observation of the knives and adapted to serve as means forpreventing upward flying movement of the material cut by the knives, andmeans engaged with the members for holding them securely together andfor holding the transparent material in its operative position.

4. A guard comprising superimposed members having annular rim portions,radial spokes carried by the members, said spokes being spaced from eachother, transparent material closing the spaces between the spokes, andfastening means engaged with the members for holding them secured toeach other and for holding the transparent material in its operativeposition.

In testimony whereof i atiix my signature in presence of two witnesses.

W ALTER Gr. STElVAB-T.

lVitnesses Cnas. S. Anarrs, CHAS. \V. Hoovnn.

